It is an arduous sport, but not a deadly one. But suddenly the top Iditarod contestants are dying in bizarre ways: first a veteran musher smashes into a tree, then competitors begin turning up dead, with each murder more brutal than the last. State trooper Alex Jensen begins a homicide investigation, determined to track down the killer before more blood stains the pristine Alaskan snow. Meanwhile, Jessie Arnold, Alaska’s premier female musher, has a shot at winning for the first time. But as her position in the race improves, so do her chances of being the killer’s next target.

As the mushers thread their way through the treacherous trails, Jessie and Jensen are drawn deep into the frozen heart of the perilous wild: where nature can kill as easily as a bullet and only the Arctic night can hear your final screams.